Results 61 to 70 of about 18,263,514 (224)
Studies in Conjugated lmines: Nucleophilic Additions and the 1 ,3-Dipolar Cycloadditions
, 1970 Studies in Conjugated lmines: Nucleophilic Additions and the 1 ,3-Dipolar ...
Singh, Nazar, P. S. Sethi
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Angewandte Chemie, Volume 138, Issue 38, 14 September 2026.A stereoselective functionalization method of cyclic imines under mild organocatalytic conditions was developed. Bifunctional cinchona alkaloid catalysts combined with carefully optimized reaction conditions to suppress background reactivity enabled highly enantio‐ and diastereoselective addition reactions of malonates to cyclic imines.
Frederic Kölblin, Helma Wennemers
wiley +2 more sources
Cristais líquidos termotrópicos calamíticos contendo o heterociclo [1,2,3]-triazol 1,4-dissubstituído [PDF]
, 2006 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaA síntese e as propriedades térmicas de cinco séries homólogas de compostos calamíticos lineares e não lineares,
Santos, Deise Maria Pereira de Oliveira
core
Diethyl indolizine-1,3-dicarboxylate
Acta Crystallographica Section E, 2011 The title compound, C14H15NO4, was prepared by a 1,3-dipolar cycloaddition from N-(ethoxycarbonylmethy)pyridinium bromide and ethyl acrylate. The –CO2 side chains form dihedral angles of 0.2 (3) and 2.4 (3)° with ...
Bing-Xiang Wang +3 more
doaj +1 more source
Peptide Macrocyclization via Cu-catalyzed 1,3-Dipolar Cycloaddition of Azomethine Ylides [PDF]
Cyclic peptides are highly valued synthetic targets in organic and medicinal chemistry. The development of new synthetic methodologies for peptide macrocyclization, different from classical lactamization, is essential for the progress of the field ...
Francisco Javier, Adrio +4 more
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, 2016 A series of novel dispirooxindole derivatives, 3-acetyl-5-phenyl-pyrrolo(spiro-[2.3′]-1′-benzyl-oxindole)-spiro-[4.3″]-1″-benzyl-oxindoles, were synthesized via 1,3-dipolar cycloaddition of the azomethine ylide with 3-acetonylideneoxindole in high ...
Ji-Wei Ren (1883176) +5 more
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Chemistry – A European Journal, EarlyView.Per‐ethylene‐glycol (EG)‐functionalized resorcin[4]arenes containing 12, 16, and 20 EG groups namely compounds 1d, 1e, and 1f, respectively, were prepared and found to self‐assemble, in organic solvents, into hexameric capsules. These capsules are more dynamic than the ones prepared based on alkyl substituted resorcin[4]arenes.
Gangadhara Angajala +3 more
wiley +1 more source
Molecules, 2016 This paper describes the synthesis of precursors with a benzo[b]furan skeleton for the intramolecular 1,3-dipolar cycloaddition of azomethine ylides prepared from N-substituted 3-allyl-aminobenzo[b]furan-2-aldehydes and secondary amines derived from α ...
Martin Porubský +2 more
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, 1972 Department of Chemistry, Laboratory of Macromolecular and Organic Chemistry, University of Louvain, B-3030 Heverlee, Belgium Received 4 September 1972 Thennostable poly-1,2,3-triazoles (7) were prepared by the regiospecific rt:action of bisazides with. keto-stabilhed bisalkylidenephosporanes (6) in DMSO solution.
P. YKMAN, G. L' ABBE, G. SMETS
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Chemistry – A European Journal, EarlyView.This work describes the first example of a thermally stable α‐SF5 organometallic reagent, which allows for extensive downstream functionalization by allylation and acylation reactions under copper catalysis, as well as palladium‐catalyzed Negishi‐type cross‐coupling conditions up to 96% yield. In silico analysis shines initial light on the requirements
Lujie Xu, David Rombach
wiley +1 more source